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Method and apparatus for detection of concealed objects in passive thermal images using environment control

  • US 8,835,849 B1
  • Filed: 02/10/2011
  • Issued: 09/16/2014
  • Est. Priority Date: 02/10/2010
  • Status: Expired due to Fees
First Claim
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1. A method for obtaining a reflectance image of a concealed object at a scene from a plurality of thermal images, the method comprising:

  • obtaining a plurality of images, the plurality of images containing both temperature and reflectance data;

    synchronously changing illumination conditions at the scene between at least two different states for pairs of first and second images of the plurality of images;

    andderiving a third image from a pair of the images, the third image being a reflectance image,wherein a concealed object, with one of lesser or greater reflectance than reflectance generated by a human surface, generates a visible contrast on the third image.

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